Service Manual

MM-E 2072-09333-00
SPKR
to Speaker
via J6
MIC
to J6
Synthesizer 2
Frequency Control Data
Preselector
CR1-CR16
Front-End
Attenuator
(RAGC)
Q1000,
Q1013-Q1015
CR1000, CR1008
Front-End
Amplifier
Q1002,
Q1007
First
Mixer
U1000
First
IF Amplifier
Q1011
45.1 MHz
Crystal Filter
FL1, FL2
Bidirectional
IF Amplifier
Q1003, Q1006
Second IF Processor
Q1020-Q1023, FL3, FL4
20 kHz
Amplifier
P/O U1110
Antialias
Filter
P/O U1110
A/D
Converter
U1115
Digital SSB
Modulator
(DSM)
U6000
Codec
D/A Section
P/O U6040
Audio Receive
Circuits
P/O U4000,
P/O U4003,
U6081
Audio Power
Amplifier
U4002
Codec
A/D Section
P/O U6040
Audio
Amplifier
P/O U4000,
U4003
MIC
Divider by 39
U1113, U1114,
U1109
Buffers
and Filters
Q3001, Q3002
352.4-369.2 MHz
PLL
U6076, Q2007
Exciter
Amplifier
Q1004, Q1005
45.1 MHz
450 kHz
Amplifier
U6082,
P/O U4003
SINE_16.8 MHz
Reference Frequency
IF_16.8 MHz
Reference Frequency
SINE_16.8 MHz
Reference Frequency
Local Oscillator 2
44.05 to 46.15 MHz
Local Oscillator 3
430.77 kHz
1.05 MHz
DSP
Subsystem
U6042, U6038
90.2-150.4 MHz
PLL
U6075, Q2006, Q9040,
Q9020, Q9000,
Q9063-Q9065
Amplifier
U2002
Divider by 2
U2009
Bandpass
Filter
Synthesizer 1
Frequency Control Data
BIT Noise
Generator
Q9, Q30,
Q2901
RF IN
Second
Mixer
U1108
Bypass
Switch
9T
30 dB
Attenuator
Q1019
STEP_AGC_30
RF RX/TX
Switch
9R
CR1904,
CR1905
Third
Mixer
U1111
Local Oscillator 1
45.2 to 75.1 MHz
TX Amplifier
P/O U6089
Codec
U6088
RX Amplifier
P/O U6089
ISB Option
RX_AUDIO_ISB
to J5
TX_AUDIO_ISB
to J5
DSP_16.8 MHz
to DSP
TX
9T
CR1011,
CR1012
RX_AUDIO
Audio Circuits
Supply
U6098,
P/O U4000
8V_AUDIO_ISB 4V_AUDIO_ISB
SW_A+
STEP_AGC_10 STEP_AGC_20
Band Selection
Control
U1, Q1-Q8
Preselector
Control Data
+5V Reg.
U6024
SW_A+
Amplifier
U2003
Divider by 8
U2010
Bandpass
Filter
+5V Regulator
U6025
SW_A+
Power-Up
Control
U5014
Flash Memory
U5001, U6035
SRAM
U5009, U5010
EEPROM
U6043
Address Bus (ADDR0-19)
Data Bus (DATA0-15)
Microcontroller
U5008
R/W
Y5000 or Y5002
38.4 kHz
XTAL EXTAL
I/O
Ports
Control and
Status Lines
To other
Circuits
RESET
Input/Output
Ports
U6068, U6069,
U6070
I/O Decoder
U6079
To UARTs
Control
Signals
Status and
Input Signals
Calibration
Data
Crystal
Oscillator
U3001
16.8 MHz Reference Generator
OCXO
U3002
or
D/A
Converter
U3010
Heater
Control
U3000, Q3000
OVEN_TEMP_CONT
from U1104
HEAT_CONT
10V
Regulator
U3004
SW_A+
SW_A+
+6V Reg.
U2004
To
HI POWER
+9V
Regulator
U1106
SW_A+
9V
+5V Regulator
U1107
VDD
9T/9R
Generator
U1100, Q1008,
Q1109, Q1017,
Q1018
9R
9T
+5V
Regulator
U6021
VRH
VCC
RF Power and
Oven Temp
Control Data
D/A
Converter
U1104
ADDR9-11
VCC
GPS Interface
U5007, U5006
To GPS
Receiver
(Option)
via J8
Main Microcomputer Subsystem
3.3V Regulator
U6097
+3.3V
to DSP Subsystem
VCC (+5V)
VCC
BIAS_OUT
OVEN_TEMP_CONT
To Control Head via J6,
and to ACCESSORY J5
EEPROM
Access
Control
Write Protect
IF RX/TX
Switch
9T
OCXO
Option
CR5004
CR5000
INT to
U5008
UART Unit
U6062, U6063,
U6078
To Backup
Battery
J4
+
_
Analog
Indications
A/D Converter
Inputs
TX Audio
and Data
Sources from
ACCESSORY
J5
RX Audio
and Data
Sources to
ACCESSORY
J5
PTT Signals to
U5008 via J5, J6
Data Bus
Address Bus
HPI
To DSP
HPI
STEP_AGC_30_2
STEP_AGC_10_2
Figure 2-12. LORD Module, Block Diagram
2-23/2-24